Air-heating apparatus.



W. F. COX.

AIR HEATING APPARATUS.

APPLICATION FILED OCT-2,1916.

Patented Oct. 8, 1918.

sTATEs'PA ENT OFFICE.

WILLIAM F. COX, 0F DANVILLE, VIRGINIA.

AIR-HEATING AIPARATUS.

Specification of Letters Patent,

Patented 0a. s, 1918.

Original application filed January 25, 1916, Seria1 No. 74,210. Divided and this application filed October 2,

To all whom it may concern. v

Be it known that I, vVILLIAM F. Cox, a citizen of the United States, residing at Danville, in the county of Pittsylvania and State of Virginia, have invented certain new and useful Improvements in Air-Heating Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make anduse the same. V q I My invention relates tov new and useful improvements in air heating apparatus, for use in heating apartments, hotels, residences or the like, and is a division of my application filed J an; 25, 1916, Serial No. 74,210.

One object of my invention is to provide a furnace air heating flue, which may be made up to the size required for furnishing the necessary amount of heat, of interchangeable sections, which are exactly alike and are connected together in assembling the flue, With my improved construction a flue of any size may be built up by simply reversing everyother section. p

A further object of my invention is to pro vide a flue, which will have Tthe greatest amount of heating surfacein a practical structure and this I accomplish by corrugating certain portions of the flue sections 1ongitudinally.

A still further object isto provide a heating flue, which'is readily cleanable as each section of the flue includes a clean-out passage for removing soot or the like therefrom.

lViththe foregoing objects outlined, and with other objects in view, it will be apparent as the nature of the invention is'better understood, that the present invention resides in the combination and arrangement of parts, and in the details hereinafter described and claimed, and shown'in the'accompanying drawing. It will beunderstood that changeslin theprecise embodiment of the invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invention or sacrificing any of its advantages.

Referringto the drawings,

Figure 1 is a frontview of the furnace with my improved heating flues secured thereto, and showinga portion of the air casing which surrounds said furnace and flues.

Fig. 2 is a vertical longitudinal sectional Serial No. 123,369. g

' the discharge of the products of combustion located in said casing and has its fuel charg-.

ingsleeve 5, grate bar'extensions 6, draft regulating passageway 7, and the forward portion of its ash pan 8, extendingrthrough the front wall 9 of said casing, so that the furnace may beoperated without entering said casing. The furnace is providedatits upper end with two hollow extensionslO for and a made up air heating flue 11 is detachably secured to each of these extensions by means of bolts 12. e a

Each of'the air heating flues is made up of detachably connected sections, the number of sections used, depending on the amount of heating required. 4

In the device illustrated in the drawing, three sections 13, 14; and 15 are shown in exactly alike, one only need be described. Each of the sections consists of vertical headers 16 having end flanges 17 a substantially horizontal or inclined pipe 18, which is prefclean-out passageway 19 which is integral with one of the vertical headers, and a cover 20 for said clean-outpassageway. The pipe 18*is corrugated longitudinally in order to provide the greatest amount of heating surface practicable in eachflue section.

It Will be noted from the drawing that one of the vertical headers 16 of certain sections is provided with 'a weighted damper 21, 100

which is pivoted in the header on a pin 22 and may be raised by a chain 23, that isconnected'to said damper and extends through the clean-out passageway 19 and cover 20 to the exterior .of the casing, where it may 105 be manipulated by the ring 24. Pins 25 are provided in the headers 16, which carry .the dampers, to prevent the dampers from swinging below horizontal, and from the drawing it will be seen that the dampers, 110

each flue, and as all of the sections aremade erably integral with'the vertical headers, a I.

when raised do not extend high enough to interfere with any cleaning implement which might be inserted in the clean-out passageways for cleaning the flue sections,

In assembling the flue sections shown in the drawing, the clean-out passageway 19 of the section 13 is first inserted in an aperture in the rear wall of thecasing 1 and the flange 17 on the lower end of the right hand vertical header of said section is secured to one of the furnace extensions by the bolts 12, and a closing plate or cover 26 is then secured to the lower flange of the opposite vertical header, of the section, by bolts 27., The next section 1% is then placed on the section 13 with its clean out passageway 19 extending through the front of the casing 1 and the lower flanges 17 of the section 14: are secured to the upper flanges of the section 13 by means of bolts 28. Section 15 is then placed on section 1a with its clean-out passageway extending through the rear ofthe casing 1 and bolts 29 are used to secure sections 14: and 15 together, after which a plate 30 is secured to the right hand vertical header of the section 15, and a fine pipe 31 is secured to the left hand vertical header for conveying the heated gases to the chimney of the building. It will therefore be seen, that in building up the heating flue or flues it is only necessary to turn every other section around or reverse the same before attaching it to the adjacent section.

lVhen the furnace is in use, the air which enters the casing 1 passes by the flues and is thereby heated, and during this time the dampers 21 remain in the position shown in the drawing, but should it be desired to permit the gases to pass directly to the chimney, the dampers, in the left handheaders of the sections 13 will be raised, and the products of combustion will pass directly to the chimney without taking the zigzag route through the flues. Q

By forming the sections of the heating fines of a single integral piece, I obtain a heater which is practically gas tight and by detachably connecting said sections together I can remove the same at any time and quickly substitute a similar unit in its place, and where it is desired to have a greater number of sections, I can build up a flue to the desired size, by reversing each alternate section and connecting them together.

As is well known in structures of this character, there will be suflicient lost motion or play between the joints of the headers to provide for the necessary expansion and contraction between the sections of the flue.

What I claim and desire to secure by Letters Patent is 1. In an apparatus for heating air, a furnace, and a zig-zag flue comprising a plurality of substantially identical units, each of which consists of two parallel headers provided with end flanges, and a pipe connecting said headers, whereby the ends of the units may be reversed in building said flue.

2. In an apparatus for heating air, a furnace, and a zig-zag flue comprising a plurality of substantially identical units, each of which consists of two parallel headers, and a pipe connecting said headers and inclined with respect thereto, whereby the ends of the units may be reversed in building said flue. I

3. In an apparatus for heating air, a furnace, and a zig-zagvflue comprising a plurality of substantially identical units, each of which onsists of two parallel headers, provided with end flanges, and a pipe integral with said headers and inclined with respect thereto, whereby the ends of the units may be reversed in building said fine.

1. In an apparatus for heating air, a furnace, and a zig-zag flue comprising a plurality of substantially identical units, each of which consists oftwo parallel headers, a clean out passageway integral with one of the headers, and a pipe connecting said headers and inclined with respect thereto, whereby the ends of the units may be reversed in building said flue.

5. In an apparatus for heating air, a furnace, and a zig-zag flue comprising a plurality of substantially identical units, each of which consists of two parallel headers provided with end flanges having bolt apertures, a lean out passageway integral with one of said headers, and a longitudinally corrugated pipe integral with said headers and inclined with respect thereto, whereby the ends of the units may be reversed in building said fine.

6. In an apparatus for heating air, a furnace, and a zig-zag flue comprising a plurality of substantially identical units, each of which consists of two parallel headers, and a pipe connecting the headers of each unit, whereby the ends of the units may be reversed in building said flues.

In testimony whereof I aflix my signature, in the presence of two witnesses.

WILLIAM F. COX. lVitnesses C. H. VADEN, R. M. Fox, Jr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

